 |
| |||
| petroleum production (Alexander Demidov) | |||
| oil and gas production (MichaelBurov); oil and gas recovery (MichaelBurov) | |||
|
газонефтедобыч : 2 do fraz, 1 tematyki |
| Olej i gaz | 2 |
|
| |||
| petroleum production (Alexander Demidov) | |||
| oil and gas production (MichaelBurov); oil and gas recovery (MichaelBurov) | |||
|
газонефтедобыч : 2 do fraz, 1 tematyki |
| Olej i gaz | 2 |